Two new first levels show you how to play, with a hand pointing the way. A free Hint button shows a move whenever you want one. When a shelf says no, it now says why - and lights up the plank that would fix it. A tick on every finished shelf, a bigger case on the early levels, and every level opens instantly. Panels of frosted glass, like the doors of the case.
Only the current version so far — new entries appear as the game ships updates.
The shelves move. Sort the mess, shelf by shelf. No timers, undo is free.